1/*****************************************************************************/ 2 3/* 4 * devio.c -- User space communication with USB devices. 5 * 6 * Copyright (C) 1999-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 * $Id: devio.c,v 1.1.1.1 2007/10/11 23:34:37 Exp $ 23 * 24 * This file implements the usbfs/x/y files, where 25 * x is the bus number and y the device number. 26 * 27 * It allows user space programs/"drivers" to communicate directly 28 * with USB devices without intervening kernel driver. 29 * 30 * Revision history 31 * 22.12.1999 0.1 Initial release (split from proc_usb.c) 32 * 04.01.2000 0.2 Turned into its own filesystem 33 * 30.09.2005 0.3 Fix user-triggerable oops in async URB delivery 34 * (CAN-2005-3055) 35 */ 36 37/*****************************************************************************/ 38 39#include <linux/fs.h> 40#include <linux/mm.h> 41#include <linux/slab.h> 42#include <linux/smp_lock.h> 43#include <linux/signal.h> 44#include <linux/poll.h> 45#include <linux/module.h> 46#include <linux/usb.h> 47#include <linux/usbdevice_fs.h> 48#include <linux/cdev.h> 49#include <linux/notifier.h> 50#include <linux/security.h> 51#include <asm/uaccess.h> 52#include <asm/byteorder.h> 53#include <linux/moduleparam.h> 54 55#include "hcd.h" /* for usbcore internals */ 56#include "usb.h" 57 58#define USB_MAXBUS 64 59#define USB_DEVICE_MAX USB_MAXBUS * 128 60 61/* Mutual exclusion for removal, open, and release */ 62DEFINE_MUTEX(usbfs_mutex); 63 64struct async { 65 struct list_head asynclist; 66 struct dev_state *ps; 67 struct pid *pid; 68 uid_t uid, euid; 69 unsigned int signr; 70 unsigned int ifnum; 71 void __user *userbuffer; 72 void __user *userurb; 73 struct urb *urb; 74 u32 secid; 75}; 76 77static int usbfs_snoop = 0; 78module_param (usbfs_snoop, bool, S_IRUGO | S_IWUSR); 79MODULE_PARM_DESC (usbfs_snoop, "true to log all usbfs traffic"); 80 81#define snoop(dev, format, arg...) \ 82 do { \ 83 if (usbfs_snoop) \ 84 dev_info( dev , format , ## arg); \ 85 } while (0) 86 87#define USB_DEVICE_DEV MKDEV(USB_DEVICE_MAJOR, 0) 88 89 90#define MAX_USBFS_BUFFER_SIZE 16384 91 92static inline int connected (struct dev_state *ps) 93{ 94 return (!list_empty(&ps->list) && 95 ps->dev->state != USB_STATE_NOTATTACHED); 96} 97 98static loff_t usbdev_lseek(struct file *file, loff_t offset, int orig) 99{ 100 loff_t ret; 101 102 lock_kernel(); 103 104 switch (orig) { 105 case 0: 106 file->f_pos = offset; 107 ret = file->f_pos; 108 break; 109 case 1: 110 file->f_pos += offset; 111 ret = file->f_pos; 112 break; 113 case 2: 114 default: 115 ret = -EINVAL; 116 } 117 118 unlock_kernel(); 119 return ret; 120} 121 122static ssize_t usbdev_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) 123{ 124 struct dev_state *ps = file->private_data; 125 struct usb_device *dev = ps->dev; 126 ssize_t ret = 0; 127 unsigned len; 128 loff_t pos; 129 int i; 130 131 pos = *ppos; 132 usb_lock_device(dev); 133 if (!connected(ps)) { 134 ret = -ENODEV; 135 goto err; 136 } else if (pos < 0) { 137 ret = -EINVAL; 138 goto err; 139 } 140 141 if (pos < sizeof(struct usb_device_descriptor)) { 142 struct usb_device_descriptor temp_desc ; /* 18 bytes - fits on the stack */ 143 144 memcpy(&temp_desc, &dev->descriptor, sizeof(dev->descriptor)); 145 le16_to_cpus(&temp_desc.bcdUSB); 146 le16_to_cpus(&temp_desc.idVendor); 147 le16_to_cpus(&temp_desc.idProduct); 148 le16_to_cpus(&temp_desc.bcdDevice); 149 150 len = sizeof(struct usb_device_descriptor) - pos; 151 if (len > nbytes) 152 len = nbytes; 153 if (copy_to_user(buf, ((char *)&temp_desc) + pos, len)) { 154 ret = -EFAULT; 155 goto err; 156 } 157 158 *ppos += len; 159 buf += len; 160 nbytes -= len; 161 ret += len; 162 } 163 164 pos = sizeof(struct usb_device_descriptor); 165 for (i = 0; nbytes && i < dev->descriptor.bNumConfigurations; i++) { 166 struct usb_config_descriptor *config = 167 (struct usb_config_descriptor *)dev->rawdescriptors[i]; 168 unsigned int length = le16_to_cpu(config->wTotalLength); 169 170 if (*ppos < pos + length) { 171 172 /* The descriptor may claim to be longer than it 173 * really is. Here is the actual allocated length. */ 174 unsigned alloclen = 175 le16_to_cpu(dev->config[i].desc.wTotalLength); 176 177 len = length - (*ppos - pos); 178 if (len > nbytes) 179 len = nbytes; 180 181 /* Simply don't write (skip over) unallocated parts */ 182 if (alloclen > (*ppos - pos)) { 183 alloclen -= (*ppos - pos); 184 if (copy_to_user(buf, 185 dev->rawdescriptors[i] + (*ppos - pos), 186 min(len, alloclen))) { 187 ret = -EFAULT; 188 goto err; 189 } 190 } 191 192 *ppos += len; 193 buf += len; 194 nbytes -= len; 195 ret += len; 196 } 197 198 pos += length; 199 } 200 201err: 202 usb_unlock_device(dev); 203 return ret; 204} 205 206/* 207 * async list handling 208 */ 209 210static struct async *alloc_async(unsigned int numisoframes) 211{ 212 unsigned int assize = sizeof(struct async) + numisoframes * sizeof(struct usb_iso_packet_descriptor); 213 struct async *as = kzalloc(assize, GFP_KERNEL); 214 215 if (!as) 216 return NULL; 217 as->urb = usb_alloc_urb(numisoframes, GFP_KERNEL); 218 if (!as->urb) { 219 kfree(as); 220 return NULL; 221 } 222 return as; 223} 224 225static void free_async(struct async *as) 226{ 227 put_pid(as->pid); 228 kfree(as->urb->transfer_buffer); 229 kfree(as->urb->setup_packet); 230 usb_free_urb(as->urb); 231 kfree(as); 232} 233 234static inline void async_newpending(struct async *as) 235{ 236 struct dev_state *ps = as->ps; 237 unsigned long flags; 238 239 spin_lock_irqsave(&ps->lock, flags); 240 list_add_tail(&as->asynclist, &ps->async_pending); 241 spin_unlock_irqrestore(&ps->lock, flags); 242} 243 244static inline void async_removepending(struct async *as) 245{ 246 struct dev_state *ps = as->ps; 247 unsigned long flags; 248 249 spin_lock_irqsave(&ps->lock, flags); 250 list_del_init(&as->asynclist); 251 spin_unlock_irqrestore(&ps->lock, flags); 252} 253 254static inline struct async *async_getcompleted(struct dev_state *ps) 255{ 256 unsigned long flags; 257 struct async *as = NULL; 258 259 spin_lock_irqsave(&ps->lock, flags); 260 if (!list_empty(&ps->async_completed)) { 261 as = list_entry(ps->async_completed.next, struct async, asynclist); 262 list_del_init(&as->asynclist); 263 } 264 spin_unlock_irqrestore(&ps->lock, flags); 265 return as; 266} 267 268static inline struct async *async_getpending(struct dev_state *ps, void __user *userurb) 269{ 270 unsigned long flags; 271 struct async *as; 272 273 spin_lock_irqsave(&ps->lock, flags); 274 list_for_each_entry(as, &ps->async_pending, asynclist) 275 if (as->userurb == userurb) { 276 list_del_init(&as->asynclist); 277 spin_unlock_irqrestore(&ps->lock, flags); 278 return as; 279 } 280 spin_unlock_irqrestore(&ps->lock, flags); 281 return NULL; 282} 283 284static void snoop_urb(struct urb *urb, void __user *userurb) 285{ 286 int j; 287 unsigned char *data = urb->transfer_buffer; 288 289 if (!usbfs_snoop) 290 return; 291 292 if (urb->pipe & USB_DIR_IN) 293 dev_info(&urb->dev->dev, "direction=IN\n"); 294 else 295 dev_info(&urb->dev->dev, "direction=OUT\n"); 296 dev_info(&urb->dev->dev, "userurb=%p\n", userurb); 297 dev_info(&urb->dev->dev, "transfer_buffer_length=%d\n", 298 urb->transfer_buffer_length); 299 dev_info(&urb->dev->dev, "actual_length=%d\n", urb->actual_length); 300 dev_info(&urb->dev->dev, "data: "); 301 for (j = 0; j < urb->transfer_buffer_length; ++j) 302 printk ("%02x ", data[j]); 303 printk("\n"); 304} 305 306static void async_completed(struct urb *urb) 307{ 308 struct async *as = urb->context; 309 struct dev_state *ps = as->ps; 310 struct siginfo sinfo; 311 312 spin_lock(&ps->lock); 313 list_move_tail(&as->asynclist, &ps->async_completed); 314 spin_unlock(&ps->lock); 315 if (as->signr) { 316 sinfo.si_signo = as->signr; 317 sinfo.si_errno = as->urb->status; 318 sinfo.si_code = SI_ASYNCIO; 319 sinfo.si_addr = as->userurb; 320 kill_pid_info_as_uid(as->signr, &sinfo, as->pid, as->uid, 321 as->euid, as->secid); 322 } 323 snoop(&urb->dev->dev, "urb complete\n"); 324 snoop_urb(urb, as->userurb); 325 wake_up(&ps->wait); 326} 327 328static void destroy_async (struct dev_state *ps, struct list_head *list) 329{ 330 struct async *as; 331 unsigned long flags; 332 333 spin_lock_irqsave(&ps->lock, flags); 334 while (!list_empty(list)) { 335 as = list_entry(list->next, struct async, asynclist); 336 list_del_init(&as->asynclist); 337 338 /* drop the spinlock so the completion handler can run */ 339 spin_unlock_irqrestore(&ps->lock, flags); 340 usb_kill_urb(as->urb); 341 spin_lock_irqsave(&ps->lock, flags); 342 } 343 spin_unlock_irqrestore(&ps->lock, flags); 344 as = async_getcompleted(ps); 345 while (as) { 346 free_async(as); 347 as = async_getcompleted(ps); 348 } 349} 350 351static void destroy_async_on_interface (struct dev_state *ps, unsigned int ifnum) 352{ 353 struct list_head *p, *q, hitlist; 354 unsigned long flags; 355 356 INIT_LIST_HEAD(&hitlist); 357 spin_lock_irqsave(&ps->lock, flags); 358 list_for_each_safe(p, q, &ps->async_pending) 359 if (ifnum == list_entry(p, struct async, asynclist)->ifnum) 360 list_move_tail(p, &hitlist); 361 spin_unlock_irqrestore(&ps->lock, flags); 362 destroy_async(ps, &hitlist); 363} 364 365static inline void destroy_all_async(struct dev_state *ps) 366{ 367 destroy_async(ps, &ps->async_pending); 368} 369 370/* 371 * interface claims are made only at the request of user level code, 372 * which can also release them (explicitly or by closing files). 373 * they're also undone when devices disconnect. 374 */ 375 376static int driver_probe (struct usb_interface *intf, 377 const struct usb_device_id *id) 378{ 379 return -ENODEV; 380} 381 382static void driver_disconnect(struct usb_interface *intf) 383{ 384 struct dev_state *ps = usb_get_intfdata (intf); 385 unsigned int ifnum = intf->altsetting->desc.bInterfaceNumber; 386 387 if (!ps) 388 return; 389 390 /* NOTE: this relies on usbcore having canceled and completed 391 * all pending I/O requests; 2.6 does that. 392 */ 393 394 if (likely(ifnum < 8*sizeof(ps->ifclaimed))) 395 clear_bit(ifnum, &ps->ifclaimed); 396 else 397 warn("interface number %u out of range", ifnum); 398 399 usb_set_intfdata (intf, NULL); 400 401 /* force async requests to complete */ 402 destroy_async_on_interface(ps, ifnum); 403} 404 405struct usb_driver usbfs_driver = { 406 .name = "usbfs", 407 .probe = driver_probe, 408 .disconnect = driver_disconnect, 409}; 410 411static int claimintf(struct dev_state *ps, unsigned int ifnum) 412{ 413 struct usb_device *dev = ps->dev; 414 struct usb_interface *intf; 415 int err; 416 417 if (ifnum >= 8*sizeof(ps->ifclaimed)) 418 return -EINVAL; 419 /* already claimed */ 420 if (test_bit(ifnum, &ps->ifclaimed)) 421 return 0; 422 423 intf = usb_ifnum_to_if(dev, ifnum); 424 if (!intf) 425 err = -ENOENT; 426 else 427 err = usb_driver_claim_interface(&usbfs_driver, intf, ps); 428 if (err == 0) 429 set_bit(ifnum, &ps->ifclaimed); 430 return err; 431} 432 433static int releaseintf(struct dev_state *ps, unsigned int ifnum) 434{ 435 struct usb_device *dev; 436 struct usb_interface *intf; 437 int err; 438 439 err = -EINVAL; 440 if (ifnum >= 8*sizeof(ps->ifclaimed)) 441 return err; 442 dev = ps->dev; 443 intf = usb_ifnum_to_if(dev, ifnum); 444 if (!intf) 445 err = -ENOENT; 446 else if (test_and_clear_bit(ifnum, &ps->ifclaimed)) { 447 usb_driver_release_interface(&usbfs_driver, intf); 448 err = 0; 449 } 450 return err; 451} 452 453static int checkintf(struct dev_state *ps, unsigned int ifnum) 454{ 455 if (ps->dev->state != USB_STATE_CONFIGURED) 456 return -EHOSTUNREACH; 457 if (ifnum >= 8*sizeof(ps->ifclaimed)) 458 return -EINVAL; 459 if (test_bit(ifnum, &ps->ifclaimed)) 460 return 0; 461 /* if not yet claimed, claim it for the driver */ 462 dev_warn(&ps->dev->dev, "usbfs: process %d (%s) did not claim interface %u before use\n", 463 current->pid, current->comm, ifnum); 464 return claimintf(ps, ifnum); 465} 466 467static int findintfep(struct usb_device *dev, unsigned int ep) 468{ 469 unsigned int i, j, e; 470 struct usb_interface *intf; 471 struct usb_host_interface *alts; 472 struct usb_endpoint_descriptor *endpt; 473 474 if (ep & ~(USB_DIR_IN|0xf)) 475 return -EINVAL; 476 if (!dev->actconfig) 477 return -ESRCH; 478 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { 479 intf = dev->actconfig->interface[i]; 480 for (j = 0; j < intf->num_altsetting; j++) { 481 alts = &intf->altsetting[j]; 482 for (e = 0; e < alts->desc.bNumEndpoints; e++) { 483 endpt = &alts->endpoint[e].desc; 484 if (endpt->bEndpointAddress == ep) 485 return alts->desc.bInterfaceNumber; 486 } 487 } 488 } 489 return -ENOENT; 490} 491 492static int check_ctrlrecip(struct dev_state *ps, unsigned int requesttype, unsigned int index) 493{ 494 int ret = 0; 495 496 if (ps->dev->state != USB_STATE_ADDRESS 497 && ps->dev->state != USB_STATE_CONFIGURED) 498 return -EHOSTUNREACH; 499 if (USB_TYPE_VENDOR == (USB_TYPE_MASK & requesttype)) 500 return 0; 501 502 index &= 0xff; 503 switch (requesttype & USB_RECIP_MASK) { 504 case USB_RECIP_ENDPOINT: 505 if ((ret = findintfep(ps->dev, index)) >= 0) 506 ret = checkintf(ps, ret); 507 break; 508 509 case USB_RECIP_INTERFACE: 510 ret = checkintf(ps, index); 511 break; 512 } 513 return ret; 514} 515 516static int __match_minor(struct device *dev, void *data) 517{ 518 int minor = *((int *)data); 519 520 if (dev->devt == MKDEV(USB_DEVICE_MAJOR, minor)) 521 return 1; 522 return 0; 523} 524 525static struct usb_device *usbdev_lookup_by_minor(int minor) 526{ 527 struct device *dev; 528 529 dev = bus_find_device(&usb_bus_type, NULL, &minor, __match_minor); 530 if (!dev) 531 return NULL; 532 put_device(dev); 533 return container_of(dev, struct usb_device, dev); 534} 535 536/* 537 * file operations 538 */ 539static int usbdev_open(struct inode *inode, struct file *file) 540{ 541 struct usb_device *dev = NULL; 542 struct dev_state *ps; 543 int ret; 544 545 /* Protect against simultaneous removal or release */ 546 mutex_lock(&usbfs_mutex); 547 548 ret = -ENOMEM; 549 if (!(ps = kmalloc(sizeof(struct dev_state), GFP_KERNEL))) 550 goto out; 551 552 ret = -ENOENT; 553 /* usbdev device-node */ 554 if (imajor(inode) == USB_DEVICE_MAJOR) 555 dev = usbdev_lookup_by_minor(iminor(inode)); 556#ifdef CONFIG_USB_DEVICEFS 557 /* procfs file */ 558 if (!dev) 559 dev = inode->i_private; 560#endif 561 if (!dev) 562 goto out; 563 ret = usb_autoresume_device(dev); 564 if (ret) 565 goto out; 566 567 usb_get_dev(dev); 568 ret = 0; 569 ps->dev = dev; 570 ps->file = file; 571 spin_lock_init(&ps->lock); 572 INIT_LIST_HEAD(&ps->list); 573 INIT_LIST_HEAD(&ps->async_pending); 574 INIT_LIST_HEAD(&ps->async_completed); 575 init_waitqueue_head(&ps->wait); 576 ps->discsignr = 0; 577 ps->disc_pid = get_pid(task_pid(current)); 578 ps->disc_uid = current->uid; 579 ps->disc_euid = current->euid; 580 ps->disccontext = NULL; 581 ps->ifclaimed = 0; 582 security_task_getsecid(current, &ps->secid); 583 smp_wmb(); 584 list_add_tail(&ps->list, &dev->filelist); 585 file->private_data = ps; 586 out: 587 if (ret) 588 kfree(ps); 589 mutex_unlock(&usbfs_mutex); 590 return ret; 591} 592 593static int usbdev_release(struct inode *inode, struct file *file) 594{ 595 struct dev_state *ps = file->private_data; 596 struct usb_device *dev = ps->dev; 597 unsigned int ifnum; 598 599 usb_lock_device(dev); 600 601 /* Protect against simultaneous open */ 602 mutex_lock(&usbfs_mutex); 603 list_del_init(&ps->list); 604 mutex_unlock(&usbfs_mutex); 605 606 for (ifnum = 0; ps->ifclaimed && ifnum < 8*sizeof(ps->ifclaimed); 607 ifnum++) { 608 if (test_bit(ifnum, &ps->ifclaimed)) 609 releaseintf(ps, ifnum); 610 } 611 destroy_all_async(ps); 612 usb_autosuspend_device(dev); 613 usb_unlock_device(dev); 614 usb_put_dev(dev); 615 put_pid(ps->disc_pid); 616 kfree(ps); 617 return 0; 618} 619 620static int proc_control(struct dev_state *ps, void __user *arg) 621{ 622 struct usb_device *dev = ps->dev; 623 struct usbdevfs_ctrltransfer ctrl; 624 unsigned int tmo; 625 unsigned char *tbuf; 626 int i, j, ret; 627 628 if (copy_from_user(&ctrl, arg, sizeof(ctrl))) 629 return -EFAULT; 630 if ((ret = check_ctrlrecip(ps, ctrl.bRequestType, ctrl.wIndex))) 631 return ret; 632 if (ctrl.wLength > PAGE_SIZE) 633 return -EINVAL; 634 if (!(tbuf = (unsigned char *)__get_free_page(GFP_KERNEL))) 635 return -ENOMEM; 636 tmo = ctrl.timeout; 637 if (ctrl.bRequestType & 0x80) { 638 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data, ctrl.wLength)) { 639 free_page((unsigned long)tbuf); 640 return -EINVAL; 641 } 642 snoop(&dev->dev, "control read: bRequest=%02x " 643 "bRrequestType=%02x wValue=%04x " 644 "wIndex=%04x wLength=%04x\n", 645 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, 646 ctrl.wIndex, ctrl.wLength); 647 648 usb_unlock_device(dev); 649 i = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 650 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 651 usb_lock_device(dev); 652 if ((i > 0) && ctrl.wLength) { 653 if (usbfs_snoop) { 654 dev_info(&dev->dev, "control read: data "); 655 for (j = 0; j < i; ++j) 656 printk("%02x ", (unsigned char)(tbuf)[j]); 657 printk("\n"); 658 } 659 if (copy_to_user(ctrl.data, tbuf, i)) { 660 free_page((unsigned long)tbuf); 661 return -EFAULT; 662 } 663 } 664 } else { 665 if (ctrl.wLength) { 666 if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) { 667 free_page((unsigned long)tbuf); 668 return -EFAULT; 669 } 670 } 671 snoop(&dev->dev, "control write: bRequest=%02x " 672 "bRrequestType=%02x wValue=%04x " 673 "wIndex=%04x wLength=%04x\n", 674 ctrl.bRequest, ctrl.bRequestType, ctrl.wValue, 675 ctrl.wIndex, ctrl.wLength); 676 if (usbfs_snoop) { 677 dev_info(&dev->dev, "control write: data: "); 678 for (j = 0; j < ctrl.wLength; ++j) 679 printk("%02x ", (unsigned char)(tbuf)[j]); 680 printk("\n"); 681 } 682 usb_unlock_device(dev); 683 i = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), ctrl.bRequest, ctrl.bRequestType, 684 ctrl.wValue, ctrl.wIndex, tbuf, ctrl.wLength, tmo); 685 usb_lock_device(dev); 686 } 687 free_page((unsigned long)tbuf); 688 if (i<0 && i != -EPIPE) { 689 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL " 690 "failed cmd %s rqt %u rq %u len %u ret %d\n", 691 current->comm, ctrl.bRequestType, ctrl.bRequest, 692 ctrl.wLength, i); 693 } 694 return i; 695} 696 697static int proc_bulk(struct dev_state *ps, void __user *arg) 698{ 699 struct usb_device *dev = ps->dev; 700 struct usbdevfs_bulktransfer bulk; 701 unsigned int tmo, len1, pipe; 702 int len2; 703 unsigned char *tbuf; 704 int i, j, ret; 705 706 if (copy_from_user(&bulk, arg, sizeof(bulk))) 707 return -EFAULT; 708 if ((ret = findintfep(ps->dev, bulk.ep)) < 0) 709 return ret; 710 if ((ret = checkintf(ps, ret))) 711 return ret; 712 if (bulk.ep & USB_DIR_IN) 713 pipe = usb_rcvbulkpipe(dev, bulk.ep & 0x7f); 714 else 715 pipe = usb_sndbulkpipe(dev, bulk.ep & 0x7f); 716 if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN))) 717 return -EINVAL; 718 len1 = bulk.len; 719 if (len1 > MAX_USBFS_BUFFER_SIZE) 720 return -EINVAL; 721 if (!(tbuf = kmalloc(len1, GFP_KERNEL))) 722 return -ENOMEM; 723 tmo = bulk.timeout; 724 if (bulk.ep & 0x80) { 725 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) { 726 kfree(tbuf); 727 return -EINVAL; 728 } 729 snoop(&dev->dev, "bulk read: len=0x%02x timeout=%04d\n", 730 bulk.len, bulk.timeout); 731 usb_unlock_device(dev); 732 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 733 usb_lock_device(dev); 734 if (!i && len2) { 735 if (usbfs_snoop) { 736 dev_info(&dev->dev, "bulk read: data "); 737 for (j = 0; j < len2; ++j) 738 printk("%02x ", (unsigned char)(tbuf)[j]); 739 printk("\n"); 740 } 741 if (copy_to_user(bulk.data, tbuf, len2)) { 742 kfree(tbuf); 743 return -EFAULT; 744 } 745 } 746 } else { 747 if (len1) { 748 if (copy_from_user(tbuf, bulk.data, len1)) { 749 kfree(tbuf); 750 return -EFAULT; 751 } 752 } 753 snoop(&dev->dev, "bulk write: len=0x%02x timeout=%04d\n", 754 bulk.len, bulk.timeout); 755 if (usbfs_snoop) { 756 dev_info(&dev->dev, "bulk write: data: "); 757 for (j = 0; j < len1; ++j) 758 printk("%02x ", (unsigned char)(tbuf)[j]); 759 printk("\n"); 760 } 761 usb_unlock_device(dev); 762 i = usb_bulk_msg(dev, pipe, tbuf, len1, &len2, tmo); 763 usb_lock_device(dev); 764 } 765 kfree(tbuf); 766 if (i < 0) 767 return i; 768 return len2; 769} 770 771static int proc_resetep(struct dev_state *ps, void __user *arg) 772{ 773 unsigned int ep; 774 int ret; 775 776 if (get_user(ep, (unsigned int __user *)arg)) 777 return -EFAULT; 778 if ((ret = findintfep(ps->dev, ep)) < 0) 779 return ret; 780 if ((ret = checkintf(ps, ret))) 781 return ret; 782 usb_settoggle(ps->dev, ep & 0xf, !(ep & USB_DIR_IN), 0); 783 return 0; 784} 785 786static int proc_clearhalt(struct dev_state *ps, void __user *arg) 787{ 788 unsigned int ep; 789 int pipe; 790 int ret; 791 792 if (get_user(ep, (unsigned int __user *)arg)) 793 return -EFAULT; 794 if ((ret = findintfep(ps->dev, ep)) < 0) 795 return ret; 796 if ((ret = checkintf(ps, ret))) 797 return ret; 798 if (ep & USB_DIR_IN) 799 pipe = usb_rcvbulkpipe(ps->dev, ep & 0x7f); 800 else 801 pipe = usb_sndbulkpipe(ps->dev, ep & 0x7f); 802 803 return usb_clear_halt(ps->dev, pipe); 804} 805 806 807static int proc_getdriver(struct dev_state *ps, void __user *arg) 808{ 809 struct usbdevfs_getdriver gd; 810 struct usb_interface *intf; 811 int ret; 812 813 if (copy_from_user(&gd, arg, sizeof(gd))) 814 return -EFAULT; 815 intf = usb_ifnum_to_if(ps->dev, gd.interface); 816 if (!intf || !intf->dev.driver) 817 ret = -ENODATA; 818 else { 819 strncpy(gd.driver, intf->dev.driver->name, 820 sizeof(gd.driver)); 821 ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0); 822 } 823 return ret; 824} 825 826static int proc_connectinfo(struct dev_state *ps, void __user *arg) 827{ 828 struct usbdevfs_connectinfo ci; 829 830 ci.devnum = ps->dev->devnum; 831 ci.slow = ps->dev->speed == USB_SPEED_LOW; 832 if (copy_to_user(arg, &ci, sizeof(ci))) 833 return -EFAULT; 834 return 0; 835} 836 837static int proc_resetdevice(struct dev_state *ps) 838{ 839 return usb_reset_composite_device(ps->dev, NULL); 840} 841 842static int proc_setintf(struct dev_state *ps, void __user *arg) 843{ 844 struct usbdevfs_setinterface setintf; 845 int ret; 846 847 if (copy_from_user(&setintf, arg, sizeof(setintf))) 848 return -EFAULT; 849 if ((ret = checkintf(ps, setintf.interface))) 850 return ret; 851 return usb_set_interface(ps->dev, setintf.interface, 852 setintf.altsetting); 853} 854 855static int proc_setconfig(struct dev_state *ps, void __user *arg) 856{ 857 int u; 858 int status = 0; 859 struct usb_host_config *actconfig; 860 861 if (get_user(u, (int __user *)arg)) 862 return -EFAULT; 863 864 actconfig = ps->dev->actconfig; 865 866 /* Don't touch the device if any interfaces are claimed. 867 * It could interfere with other drivers' operations, and if 868 * an interface is claimed by usbfs it could easily deadlock. 869 */ 870 if (actconfig) { 871 int i; 872 873 for (i = 0; i < actconfig->desc.bNumInterfaces; ++i) { 874 if (usb_interface_claimed(actconfig->interface[i])) { 875 dev_warn (&ps->dev->dev, 876 "usbfs: interface %d claimed by %s " 877 "while '%s' sets config #%d\n", 878 actconfig->interface[i] 879 ->cur_altsetting 880 ->desc.bInterfaceNumber, 881 actconfig->interface[i] 882 ->dev.driver->name, 883 current->comm, u); 884 status = -EBUSY; 885 break; 886 } 887 } 888 } 889 890 /* SET_CONFIGURATION is often abused as a "cheap" driver reset, 891 * so avoid usb_set_configuration()'s kick to sysfs 892 */ 893 if (status == 0) { 894 if (actconfig && actconfig->desc.bConfigurationValue == u) 895 status = usb_reset_configuration(ps->dev); 896 else 897 status = usb_set_configuration(ps->dev, u); 898 } 899 900 return status; 901} 902 903static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb, 904 struct usbdevfs_iso_packet_desc __user *iso_frame_desc, 905 void __user *arg) 906{ 907 struct usbdevfs_iso_packet_desc *isopkt = NULL; 908 struct usb_host_endpoint *ep; 909 struct async *as; 910 struct usb_ctrlrequest *dr = NULL; 911 unsigned int u, totlen, isofrmlen; 912 int ret, ifnum = -1; 913 914 if (uurb->flags & ~(USBDEVFS_URB_ISO_ASAP|USBDEVFS_URB_SHORT_NOT_OK| 915 URB_NO_FSBR|URB_ZERO_PACKET)) 916 return -EINVAL; 917 if (!uurb->buffer) 918 return -EINVAL; 919 if (uurb->signr != 0 && (uurb->signr < SIGRTMIN || uurb->signr > SIGRTMAX)) 920 return -EINVAL; 921 if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL && (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) { 922 if ((ifnum = findintfep(ps->dev, uurb->endpoint)) < 0) 923 return ifnum; 924 if ((ret = checkintf(ps, ifnum))) 925 return ret; 926 } 927 if ((uurb->endpoint & USB_ENDPOINT_DIR_MASK) != 0) 928 ep = ps->dev->ep_in [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 929 else 930 ep = ps->dev->ep_out [uurb->endpoint & USB_ENDPOINT_NUMBER_MASK]; 931 if (!ep) 932 return -ENOENT; 933 switch(uurb->type) { 934 case USBDEVFS_URB_TYPE_CONTROL: 935 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 936 != USB_ENDPOINT_XFER_CONTROL) 937 return -EINVAL; 938 /* min 8 byte setup packet, max 8 byte setup plus an arbitrary data stage */ 939 if (uurb->buffer_length < 8 || uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE)) 940 return -EINVAL; 941 if (!(dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL))) 942 return -ENOMEM; 943 if (copy_from_user(dr, uurb->buffer, 8)) { 944 kfree(dr); 945 return -EFAULT; 946 } 947 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) { 948 kfree(dr); 949 return -EINVAL; 950 } 951 if ((ret = check_ctrlrecip(ps, dr->bRequestType, le16_to_cpup(&dr->wIndex)))) { 952 kfree(dr); 953 return ret; 954 } 955 uurb->endpoint = (uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) | (dr->bRequestType & USB_ENDPOINT_DIR_MASK); 956 uurb->number_of_packets = 0; 957 uurb->buffer_length = le16_to_cpup(&dr->wLength); 958 uurb->buffer += 8; 959 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) { 960 kfree(dr); 961 return -EFAULT; 962 } 963 snoop(&ps->dev->dev, "control urb: bRequest=%02x " 964 "bRrequestType=%02x wValue=%04x " 965 "wIndex=%04x wLength=%04x\n", 966 dr->bRequest, dr->bRequestType, dr->wValue, 967 dr->wIndex, dr->wLength); 968 break; 969 970 case USBDEVFS_URB_TYPE_BULK: 971 switch (ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { 972 case USB_ENDPOINT_XFER_CONTROL: 973 case USB_ENDPOINT_XFER_ISOC: 974 return -EINVAL; 975 /* allow single-shot interrupt transfers, at bogus rates */ 976 } 977 uurb->number_of_packets = 0; 978 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 979 return -EINVAL; 980 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 981 return -EFAULT; 982 snoop(&ps->dev->dev, "bulk urb\n"); 983 break; 984 985 case USBDEVFS_URB_TYPE_ISO: 986 /* arbitrary limit */ 987 if (uurb->number_of_packets < 1 || uurb->number_of_packets > 128) 988 return -EINVAL; 989 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 990 != USB_ENDPOINT_XFER_ISOC) 991 return -EINVAL; 992 isofrmlen = sizeof(struct usbdevfs_iso_packet_desc) * uurb->number_of_packets; 993 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL))) 994 return -ENOMEM; 995 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) { 996 kfree(isopkt); 997 return -EFAULT; 998 } 999 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 1000 /* arbitrary limit, sufficient for USB 2.0 high-bandwidth iso */ 1001 if (isopkt[u].length > 8192) { 1002 kfree(isopkt); 1003 return -EINVAL; 1004 } 1005 totlen += isopkt[u].length; 1006 } 1007 if (totlen > 32768) { 1008 kfree(isopkt); 1009 return -EINVAL; 1010 } 1011 uurb->buffer_length = totlen; 1012 snoop(&ps->dev->dev, "iso urb\n"); 1013 break; 1014 1015 case USBDEVFS_URB_TYPE_INTERRUPT: 1016 uurb->number_of_packets = 0; 1017 if ((ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 1018 != USB_ENDPOINT_XFER_INT) 1019 return -EINVAL; 1020 if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE) 1021 return -EINVAL; 1022 if (!access_ok((uurb->endpoint & USB_DIR_IN) ? VERIFY_WRITE : VERIFY_READ, uurb->buffer, uurb->buffer_length)) 1023 return -EFAULT; 1024 snoop(&ps->dev->dev, "interrupt urb\n"); 1025 break; 1026 1027 default: 1028 return -EINVAL; 1029 } 1030 if (!(as = alloc_async(uurb->number_of_packets))) { 1031 kfree(isopkt); 1032 kfree(dr); 1033 return -ENOMEM; 1034 } 1035 if (!(as->urb->transfer_buffer = kmalloc(uurb->buffer_length, GFP_KERNEL))) { 1036 kfree(isopkt); 1037 kfree(dr); 1038 free_async(as); 1039 return -ENOMEM; 1040 } 1041 as->urb->dev = ps->dev; 1042 as->urb->pipe = (uurb->type << 30) | __create_pipe(ps->dev, uurb->endpoint & 0xf) | (uurb->endpoint & USB_DIR_IN); 1043 as->urb->transfer_flags = uurb->flags; 1044 as->urb->transfer_buffer_length = uurb->buffer_length; 1045 as->urb->setup_packet = (unsigned char*)dr; 1046 as->urb->start_frame = uurb->start_frame; 1047 as->urb->number_of_packets = uurb->number_of_packets; 1048 if (uurb->type == USBDEVFS_URB_TYPE_ISO || 1049 ps->dev->speed == USB_SPEED_HIGH) 1050 as->urb->interval = 1 << min(15, ep->desc.bInterval - 1); 1051 else 1052 as->urb->interval = ep->desc.bInterval; 1053 as->urb->context = as; 1054 as->urb->complete = async_completed; 1055 for (totlen = u = 0; u < uurb->number_of_packets; u++) { 1056 as->urb->iso_frame_desc[u].offset = totlen; 1057 as->urb->iso_frame_desc[u].length = isopkt[u].length; 1058 totlen += isopkt[u].length; 1059 } 1060 kfree(isopkt); 1061 as->ps = ps; 1062 as->userurb = arg; 1063 if (uurb->endpoint & USB_DIR_IN) 1064 as->userbuffer = uurb->buffer; 1065 else 1066 as->userbuffer = NULL; 1067 as->signr = uurb->signr; 1068 as->ifnum = ifnum; 1069 as->pid = get_pid(task_pid(current)); 1070 as->uid = current->uid; 1071 as->euid = current->euid; 1072 security_task_getsecid(current, &as->secid); 1073 if (!(uurb->endpoint & USB_DIR_IN)) { 1074 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer, as->urb->transfer_buffer_length)) { 1075 free_async(as); 1076 return -EFAULT; 1077 } 1078 } 1079 snoop(&as->urb->dev->dev, "submit urb\n"); 1080 snoop_urb(as->urb, as->userurb); 1081 async_newpending(as); 1082 if ((ret = usb_submit_urb(as->urb, GFP_KERNEL))) { 1083 dev_printk(KERN_DEBUG, &ps->dev->dev, "usbfs: usb_submit_urb returned %d\n", ret); 1084 async_removepending(as); 1085 free_async(as); 1086 return ret; 1087 } 1088 return 0; 1089} 1090 1091static int proc_submiturb(struct dev_state *ps, void __user *arg) 1092{ 1093 struct usbdevfs_urb uurb; 1094 1095 if (copy_from_user(&uurb, arg, sizeof(uurb))) 1096 return -EFAULT; 1097 1098 return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); 1099} 1100 1101static int proc_unlinkurb(struct dev_state *ps, void __user *arg) 1102{ 1103 struct async *as; 1104 1105 as = async_getpending(ps, arg); 1106 if (!as) 1107 return -EINVAL; 1108 usb_kill_urb(as->urb); 1109 return 0; 1110} 1111 1112static int processcompl(struct async *as, void __user * __user *arg) 1113{ 1114 struct urb *urb = as->urb; 1115 struct usbdevfs_urb __user *userurb = as->userurb; 1116 void __user *addr = as->userurb; 1117 unsigned int i; 1118 1119 if (as->userbuffer) 1120 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1121 return -EFAULT; 1122 if (put_user(urb->status, &userurb->status)) 1123 return -EFAULT; 1124 if (put_user(urb->actual_length, &userurb->actual_length)) 1125 return -EFAULT; 1126 if (put_user(urb->error_count, &userurb->error_count)) 1127 return -EFAULT; 1128 1129 if (usb_pipeisoc(urb->pipe)) { 1130 for (i = 0; i < urb->number_of_packets; i++) { 1131 if (put_user(urb->iso_frame_desc[i].actual_length, 1132 &userurb->iso_frame_desc[i].actual_length)) 1133 return -EFAULT; 1134 if (put_user(urb->iso_frame_desc[i].status, 1135 &userurb->iso_frame_desc[i].status)) 1136 return -EFAULT; 1137 } 1138 } 1139 1140 free_async(as); 1141 1142 if (put_user(addr, (void __user * __user *)arg)) 1143 return -EFAULT; 1144 return 0; 1145} 1146 1147static struct async* reap_as(struct dev_state *ps) 1148{ 1149 DECLARE_WAITQUEUE(wait, current); 1150 struct async *as = NULL; 1151 struct usb_device *dev = ps->dev; 1152 1153 add_wait_queue(&ps->wait, &wait); 1154 for (;;) { 1155 __set_current_state(TASK_INTERRUPTIBLE); 1156 if ((as = async_getcompleted(ps))) 1157 break; 1158 if (signal_pending(current)) 1159 break; 1160 usb_unlock_device(dev); 1161 schedule(); 1162 usb_lock_device(dev); 1163 } 1164 remove_wait_queue(&ps->wait, &wait); 1165 set_current_state(TASK_RUNNING); 1166 return as; 1167} 1168 1169static int proc_reapurb(struct dev_state *ps, void __user *arg) 1170{ 1171 struct async *as = reap_as(ps); 1172 if (as) 1173 return processcompl(as, (void __user * __user *)arg); 1174 if (signal_pending(current)) 1175 return -EINTR; 1176 return -EIO; 1177} 1178 1179static int proc_reapurbnonblock(struct dev_state *ps, void __user *arg) 1180{ 1181 struct async *as; 1182 1183 if (!(as = async_getcompleted(ps))) 1184 return -EAGAIN; 1185 return processcompl(as, (void __user * __user *)arg); 1186} 1187 1188#ifdef CONFIG_COMPAT 1189 1190static int get_urb32(struct usbdevfs_urb *kurb, 1191 struct usbdevfs_urb32 __user *uurb) 1192{ 1193 __u32 uptr; 1194 if (get_user(kurb->type, &uurb->type) || 1195 __get_user(kurb->endpoint, &uurb->endpoint) || 1196 __get_user(kurb->status, &uurb->status) || 1197 __get_user(kurb->flags, &uurb->flags) || 1198 __get_user(kurb->buffer_length, &uurb->buffer_length) || 1199 __get_user(kurb->actual_length, &uurb->actual_length) || 1200 __get_user(kurb->start_frame, &uurb->start_frame) || 1201 __get_user(kurb->number_of_packets, &uurb->number_of_packets) || 1202 __get_user(kurb->error_count, &uurb->error_count) || 1203 __get_user(kurb->signr, &uurb->signr)) 1204 return -EFAULT; 1205 1206 if (__get_user(uptr, &uurb->buffer)) 1207 return -EFAULT; 1208 kurb->buffer = compat_ptr(uptr); 1209 if (__get_user(uptr, &uurb->buffer)) 1210 return -EFAULT; 1211 kurb->usercontext = compat_ptr(uptr); 1212 1213 return 0; 1214} 1215 1216static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) 1217{ 1218 struct usbdevfs_urb uurb; 1219 1220 if (get_urb32(&uurb,(struct usbdevfs_urb32 __user *)arg)) 1221 return -EFAULT; 1222 1223 return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); 1224} 1225 1226static int processcompl_compat(struct async *as, void __user * __user *arg) 1227{ 1228 struct urb *urb = as->urb; 1229 struct usbdevfs_urb32 __user *userurb = as->userurb; 1230 void __user *addr = as->userurb; 1231 unsigned int i; 1232 1233 if (as->userbuffer) 1234 if (copy_to_user(as->userbuffer, urb->transfer_buffer, urb->transfer_buffer_length)) 1235 return -EFAULT; 1236 if (put_user(urb->status, &userurb->status)) 1237 return -EFAULT; 1238 if (put_user(urb->actual_length, &userurb->actual_length)) 1239 return -EFAULT; 1240 if (put_user(urb->error_count, &userurb->error_count)) 1241 return -EFAULT; 1242 1243 if (usb_pipeisoc(urb->pipe)) { 1244 for (i = 0; i < urb->number_of_packets; i++) { 1245 if (put_user(urb->iso_frame_desc[i].actual_length, 1246 &userurb->iso_frame_desc[i].actual_length)) 1247 return -EFAULT; 1248 if (put_user(urb->iso_frame_desc[i].status, 1249 &userurb->iso_frame_desc[i].status)) 1250 return -EFAULT; 1251 } 1252 } 1253 1254 free_async(as); 1255 if (put_user(ptr_to_compat(addr), (u32 __user *)arg)) 1256 return -EFAULT; 1257 return 0; 1258} 1259 1260static int proc_reapurb_compat(struct dev_state *ps, void __user *arg) 1261{ 1262 struct async *as = reap_as(ps); 1263 if (as) 1264 return processcompl_compat(as, (void __user * __user *)arg); 1265 if (signal_pending(current)) 1266 return -EINTR; 1267 return -EIO; 1268} 1269 1270static int proc_reapurbnonblock_compat(struct dev_state *ps, void __user *arg) 1271{ 1272 struct async *as; 1273 1274 if (!(as = async_getcompleted(ps))) 1275 return -EAGAIN; 1276 return processcompl_compat(as, (void __user * __user *)arg); 1277} 1278 1279#endif 1280 1281static int proc_disconnectsignal(struct dev_state *ps, void __user *arg) 1282{ 1283 struct usbdevfs_disconnectsignal ds; 1284 1285 if (copy_from_user(&ds, arg, sizeof(ds))) 1286 return -EFAULT; 1287 if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX)) 1288 return -EINVAL; 1289 ps->discsignr = ds.signr; 1290 ps->disccontext = ds.context; 1291 return 0; 1292} 1293 1294static int proc_claiminterface(struct dev_state *ps, void __user *arg) 1295{ 1296 unsigned int ifnum; 1297 1298 if (get_user(ifnum, (unsigned int __user *)arg)) 1299 return -EFAULT; 1300 return claimintf(ps, ifnum); 1301} 1302 1303static int proc_releaseinterface(struct dev_state *ps, void __user *arg) 1304{ 1305 unsigned int ifnum; 1306 int ret; 1307 1308 if (get_user(ifnum, (unsigned int __user *)arg)) 1309 return -EFAULT; 1310 if ((ret = releaseintf(ps, ifnum)) < 0) 1311 return ret; 1312 destroy_async_on_interface (ps, ifnum); 1313 return 0; 1314} 1315 1316static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) 1317{ 1318 int size; 1319 void *buf = NULL; 1320 int retval = 0; 1321 struct usb_interface *intf = NULL; 1322 struct usb_driver *driver = NULL; 1323 1324 /* alloc buffer */ 1325 if ((size = _IOC_SIZE (ctl->ioctl_code)) > 0) { 1326 if ((buf = kmalloc (size, GFP_KERNEL)) == NULL) 1327 return -ENOMEM; 1328 if ((_IOC_DIR(ctl->ioctl_code) & _IOC_WRITE)) { 1329 if (copy_from_user (buf, ctl->data, size)) { 1330 kfree(buf); 1331 return -EFAULT; 1332 } 1333 } else { 1334 memset (buf, 0, size); 1335 } 1336 } 1337 1338 if (!connected(ps)) { 1339 kfree(buf); 1340 return -ENODEV; 1341 } 1342 1343 if (ps->dev->state != USB_STATE_CONFIGURED) 1344 retval = -EHOSTUNREACH; 1345 else if (!(intf = usb_ifnum_to_if (ps->dev, ctl->ifno))) 1346 retval = -EINVAL; 1347 else switch (ctl->ioctl_code) { 1348 1349 /* disconnect kernel driver from interface */ 1350 case USBDEVFS_DISCONNECT: 1351 if (intf->dev.driver) { 1352 driver = to_usb_driver(intf->dev.driver); 1353 dev_dbg (&intf->dev, "disconnect by usbfs\n"); 1354 usb_driver_release_interface(driver, intf); 1355 } else 1356 retval = -ENODATA; 1357 break; 1358 1359 /* let kernel drivers try to (re)bind to the interface */ 1360 case USBDEVFS_CONNECT: 1361 usb_unlock_device(ps->dev); 1362 retval = bus_rescan_devices(intf->dev.bus); 1363 usb_lock_device(ps->dev); 1364 break; 1365 1366 /* talk directly to the interface's driver */ 1367 default: 1368 if (intf->dev.driver) 1369 driver = to_usb_driver(intf->dev.driver); 1370 if (driver == NULL || driver->ioctl == NULL) { 1371 retval = -ENOTTY; 1372 } else { 1373 retval = driver->ioctl (intf, ctl->ioctl_code, buf); 1374 if (retval == -ENOIOCTLCMD) 1375 retval = -ENOTTY; 1376 } 1377 } 1378 1379 /* cleanup and return */ 1380 if (retval >= 0 1381 && (_IOC_DIR (ctl->ioctl_code) & _IOC_READ) != 0 1382 && size > 0 1383 && copy_to_user (ctl->data, buf, size) != 0) 1384 retval = -EFAULT; 1385 1386 kfree(buf); 1387 return retval; 1388} 1389 1390static int proc_ioctl_default(struct dev_state *ps, void __user *arg) 1391{ 1392 struct usbdevfs_ioctl ctrl; 1393 1394 if (copy_from_user(&ctrl, arg, sizeof (ctrl))) 1395 return -EFAULT; 1396 return proc_ioctl(ps, &ctrl); 1397} 1398 1399#ifdef CONFIG_COMPAT 1400static int proc_ioctl_compat(struct dev_state *ps, compat_uptr_t arg) 1401{ 1402 struct usbdevfs_ioctl32 __user *uioc; 1403 struct usbdevfs_ioctl ctrl; 1404 u32 udata; 1405 1406 uioc = compat_ptr((long)arg); 1407 if (get_user(ctrl.ifno, &uioc->ifno) || 1408 get_user(ctrl.ioctl_code, &uioc->ioctl_code) || 1409 __get_user(udata, &uioc->data)) 1410 return -EFAULT; 1411 ctrl.data = compat_ptr(udata); 1412 1413 return proc_ioctl(ps, &ctrl); 1414} 1415#endif 1416 1417/* 1418 * NOTE: All requests here that have interface numbers as parameters 1419 * are assuming that somehow the configuration has been prevented from 1420 * changing. But there's no mechanism to ensure that... 1421 */ 1422static int usbdev_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) 1423{ 1424 struct dev_state *ps = file->private_data; 1425 struct usb_device *dev = ps->dev; 1426 void __user *p = (void __user *)arg; 1427 int ret = -ENOTTY; 1428 1429 if (!(file->f_mode & FMODE_WRITE)) 1430 return -EPERM; 1431 usb_lock_device(dev); 1432 if (!connected(ps)) { 1433 usb_unlock_device(dev); 1434 return -ENODEV; 1435 } 1436 1437 switch (cmd) { 1438 case USBDEVFS_CONTROL: 1439 snoop(&dev->dev, "%s: CONTROL\n", __FUNCTION__); 1440 ret = proc_control(ps, p); 1441 if (ret >= 0) 1442 inode->i_mtime = CURRENT_TIME; 1443 break; 1444 1445 case USBDEVFS_BULK: 1446 snoop(&dev->dev, "%s: BULK\n", __FUNCTION__); 1447 ret = proc_bulk(ps, p); 1448 if (ret >= 0) 1449 inode->i_mtime = CURRENT_TIME; 1450 break; 1451 1452 case USBDEVFS_RESETEP: 1453 snoop(&dev->dev, "%s: RESETEP\n", __FUNCTION__); 1454 ret = proc_resetep(ps, p); 1455 if (ret >= 0) 1456 inode->i_mtime = CURRENT_TIME; 1457 break; 1458 1459 case USBDEVFS_RESET: 1460 snoop(&dev->dev, "%s: RESET\n", __FUNCTION__); 1461 ret = proc_resetdevice(ps); 1462 break; 1463 1464 case USBDEVFS_CLEAR_HALT: 1465 snoop(&dev->dev, "%s: CLEAR_HALT\n", __FUNCTION__); 1466 ret = proc_clearhalt(ps, p); 1467 if (ret >= 0) 1468 inode->i_mtime = CURRENT_TIME; 1469 break; 1470 1471 case USBDEVFS_GETDRIVER: 1472 snoop(&dev->dev, "%s: GETDRIVER\n", __FUNCTION__); 1473 ret = proc_getdriver(ps, p); 1474 break; 1475 1476 case USBDEVFS_CONNECTINFO: 1477 snoop(&dev->dev, "%s: CONNECTINFO\n", __FUNCTION__); 1478 ret = proc_connectinfo(ps, p); 1479 break; 1480 1481 case USBDEVFS_SETINTERFACE: 1482 snoop(&dev->dev, "%s: SETINTERFACE\n", __FUNCTION__); 1483 ret = proc_setintf(ps, p); 1484 break; 1485 1486 case USBDEVFS_SETCONFIGURATION: 1487 snoop(&dev->dev, "%s: SETCONFIGURATION\n", __FUNCTION__); 1488 ret = proc_setconfig(ps, p); 1489 break; 1490 1491 case USBDEVFS_SUBMITURB: 1492 snoop(&dev->dev, "%s: SUBMITURB\n", __FUNCTION__); 1493 ret = proc_submiturb(ps, p); 1494 if (ret >= 0) 1495 inode->i_mtime = CURRENT_TIME; 1496 break; 1497 1498#ifdef CONFIG_COMPAT 1499 1500 case USBDEVFS_SUBMITURB32: 1501 snoop(&dev->dev, "%s: SUBMITURB32\n", __FUNCTION__); 1502 ret = proc_submiturb_compat(ps, p); 1503 if (ret >= 0) 1504 inode->i_mtime = CURRENT_TIME; 1505 break; 1506 1507 case USBDEVFS_REAPURB32: 1508 snoop(&dev->dev, "%s: REAPURB32\n", __FUNCTION__); 1509 ret = proc_reapurb_compat(ps, p); 1510 break; 1511 1512 case USBDEVFS_REAPURBNDELAY32: 1513 snoop(&dev->dev, "%s: REAPURBDELAY32\n", __FUNCTION__); 1514 ret = proc_reapurbnonblock_compat(ps, p); 1515 break; 1516 1517 case USBDEVFS_IOCTL32: 1518 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); 1519 ret = proc_ioctl_compat(ps, ptr_to_compat(p)); 1520 break; 1521#endif 1522 1523 case USBDEVFS_DISCARDURB: 1524 snoop(&dev->dev, "%s: DISCARDURB\n", __FUNCTION__); 1525 ret = proc_unlinkurb(ps, p); 1526 break; 1527 1528 case USBDEVFS_REAPURB: 1529 snoop(&dev->dev, "%s: REAPURB\n", __FUNCTION__); 1530 ret = proc_reapurb(ps, p); 1531 break; 1532 1533 case USBDEVFS_REAPURBNDELAY: 1534 snoop(&dev->dev, "%s: REAPURBDELAY\n", __FUNCTION__); 1535 ret = proc_reapurbnonblock(ps, p); 1536 break; 1537 1538 case USBDEVFS_DISCSIGNAL: 1539 snoop(&dev->dev, "%s: DISCSIGNAL\n", __FUNCTION__); 1540 ret = proc_disconnectsignal(ps, p); 1541 break; 1542 1543 case USBDEVFS_CLAIMINTERFACE: 1544 snoop(&dev->dev, "%s: CLAIMINTERFACE\n", __FUNCTION__); 1545 ret = proc_claiminterface(ps, p); 1546 break; 1547 1548 case USBDEVFS_RELEASEINTERFACE: 1549 snoop(&dev->dev, "%s: RELEASEINTERFACE\n", __FUNCTION__); 1550 ret = proc_releaseinterface(ps, p); 1551 break; 1552 1553 case USBDEVFS_IOCTL: 1554 snoop(&dev->dev, "%s: IOCTL\n", __FUNCTION__); 1555 ret = proc_ioctl_default(ps, p); 1556 break; 1557 } 1558 usb_unlock_device(dev); 1559 if (ret >= 0) 1560 inode->i_atime = CURRENT_TIME; 1561 return ret; 1562} 1563 1564/* No kernel lock - fine */ 1565static unsigned int usbdev_poll(struct file *file, struct poll_table_struct *wait) 1566{ 1567 struct dev_state *ps = file->private_data; 1568 unsigned int mask = 0; 1569 1570 poll_wait(file, &ps->wait, wait); 1571 if (file->f_mode & FMODE_WRITE && !list_empty(&ps->async_completed)) 1572 mask |= POLLOUT | POLLWRNORM; 1573 if (!connected(ps)) 1574 mask |= POLLERR | POLLHUP; 1575 return mask; 1576} 1577 1578const struct file_operations usbdev_file_operations = { 1579 .llseek = usbdev_lseek, 1580 .read = usbdev_read, 1581 .poll = usbdev_poll, 1582 .ioctl = usbdev_ioctl, 1583 .open = usbdev_open, 1584 .release = usbdev_release, 1585}; 1586 1587#ifdef CONFIG_USB_DEVICE_CLASS 1588static struct class *usb_classdev_class; 1589 1590static int usb_classdev_add(struct usb_device *dev) 1591{ 1592 int minor = ((dev->bus->busnum-1) * 128) + (dev->devnum-1); 1593 1594 dev->usb_classdev = device_create(usb_classdev_class, &dev->dev, 1595 MKDEV(USB_DEVICE_MAJOR, minor), 1596 "usbdev%d.%d", dev->bus->busnum, dev->devnum); 1597 if (IS_ERR(dev->usb_classdev)) 1598 return PTR_ERR(dev->usb_classdev); 1599 1600 return 0; 1601} 1602 1603static void usb_classdev_remove(struct usb_device *dev) 1604{ 1605 device_unregister(dev->usb_classdev); 1606} 1607 1608static int usb_classdev_notify(struct notifier_block *self, 1609 unsigned long action, void *dev) 1610{ 1611 switch (action) { 1612 case USB_DEVICE_ADD: 1613 if (usb_classdev_add(dev)) 1614 return NOTIFY_BAD; 1615 break; 1616 case USB_DEVICE_REMOVE: 1617 usb_classdev_remove(dev); 1618 break; 1619 } 1620 return NOTIFY_OK; 1621} 1622 1623static struct notifier_block usbdev_nb = { 1624 .notifier_call = usb_classdev_notify, 1625}; 1626#endif 1627 1628static struct cdev usb_device_cdev = { 1629 .kobj = {.name = "usb_device", }, 1630 .owner = THIS_MODULE, 1631}; 1632 1633int __init usb_devio_init(void) 1634{ 1635 int retval; 1636 1637 retval = register_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX, 1638 "usb_device"); 1639 if (retval) { 1640 err("unable to register minors for usb_device"); 1641 goto out; 1642 } 1643 cdev_init(&usb_device_cdev, &usbdev_file_operations); 1644 retval = cdev_add(&usb_device_cdev, USB_DEVICE_DEV, USB_DEVICE_MAX); 1645 if (retval) { 1646 err("unable to get usb_device major %d", USB_DEVICE_MAJOR); 1647 goto error_cdev; 1648 } 1649#ifdef CONFIG_USB_DEVICE_CLASS 1650 usb_classdev_class = class_create(THIS_MODULE, "usb_device"); 1651 if (IS_ERR(usb_classdev_class)) { 1652 err("unable to register usb_device class"); 1653 retval = PTR_ERR(usb_classdev_class); 1654 cdev_del(&usb_device_cdev); 1655 usb_classdev_class = NULL; 1656 goto out; 1657 } 1658 1659 usb_register_notify(&usbdev_nb); 1660#endif 1661out: 1662 return retval; 1663 1664error_cdev: 1665 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); 1666 goto out; 1667} 1668 1669void usb_devio_cleanup(void) 1670{ 1671#ifdef CONFIG_USB_DEVICE_CLASS 1672 usb_unregister_notify(&usbdev_nb); 1673 class_destroy(usb_classdev_class); 1674#endif 1675 cdev_del(&usb_device_cdev); 1676 unregister_chrdev_region(USB_DEVICE_DEV, USB_DEVICE_MAX); 1677} 1678